Or are there countries where IDs and maybe phone numbers are required before making purchases physically? Imagine how strange it would be to present your ID before buying or selling in physical world. Not sure I've ever been required to present ID before buying or selling, even physical foreign currencies offline. The kyc phenomenon seems to be peculiar to online world and bank transactions.
I think human right to privacy shouldn't be violated in anyway unless the human is involved in serious crimes or some suspicious activities. And even when ID becomes necessary, it should be handled with care to prevent it from going into the wrong hands.
By the way, the kyc issues could make thriving online economically alot difficult for people in certain remote places who probably prefer to have little to zero contact with modern world. This are the kind of people crypto would be more suitable for, unfortunately they will be denied access to lots of cryptocurrency exchanges in existence today.
Certain industries offer more control over others. Banking offers the most control over others because it is the most demanded service, as banking service is demanded as part of nearly all other services. You don't interact with a mechanic when you need a barber, but you interact with a banker when you need either a mechanic or a barber. So, by controlling banking you can get the most control over other people more so than any other industry. Every king and politician will always want control over your banking as a way to control you. Without a layer of identification, this control doesn't work nearly as well. There is no doubt a totalitarian regime will always require identification for any transaction at all as a means of maximum control over the population.
There are a few gateway rights every fascist, communist, or other totalitarian regime will require. One would be restrictions on firearms or other armaments, as you can't have the people you own with weapons that are potentially going to be used against you. Perhaps the most gateway of all gateway rights is privacy, because without privacy you can track every single person's every action at all times, and of course that makes control over others vastly more simple in many ways, from controlling their armaments to controlling their travel. For example, you can't have for example a surf in your fiefdom learning too much about South Korea if you live in North Korea, so you'd want to seal off the border.
Notice that gateway rights are needed by both the left and the right. Any far-right or far-left group will want to take away your privacy rights. The left will need to control your economic expressions, while the right will need to control your social expressions, and privacy in service such as banking is the most clear hurdle of such a person to deny people their human rights to trade or travel freely.